If you do not want the TikTok catalog to obtain the latest configuration of the feed from Google, you can disconnect the Google account.
Note: This action does not remove your catalog. It only prevents your catalog from obtaining the latest configuration of your Google feed. Your TikTok catalog will run independently from your Google feed until you decide to delete or stop the feed.
Go to Catalog Manager
Click Product Sources
Click settings
Sign out under Import from Google Merchant Center